Yanking large popular apps is a two way street for a platform. They hurt themselves, possibly even more if they do it enough. A good amount of people would st

Yanking large popular apps is a two way street for a platform. They hurt themselves, possibly even more if they do it enough. A good amount of people would stop using / buying iphones if their device stopped using facebook, uber, or some other central app in their lives. It would also disuade a bunch more customers from buying from that platform again, because they don't know what else would be yanked from them. Platforms live and die on what they can provide, if one platform is missing a bunch of central apps, it's not going to succeed as one.